I'm not sure about which error your pulling exactly as I'm using the latest Bazaar version for PHP5 and I've also been hacking into it to make it work. But I'm guessing that your XML file is missing one of the core features like

/store/categories/category
/store/manufacturers/manufacturer
/store/products/product

etc which i assumes are there even if have no data for them. Perhaps disable all the modules you have no data for (including attributes). I would be interested to know if you manage to get images importing.